Extension-table lock.



PATENTED OCT. 11, 1904.

J. F. ARNOLD. EXTENSION TABLE LOCK,

APPLIOATIOH FILED r213. 19, 1904.

no MODEL.

ATTORNEY v m z w 0 WITNESSES E Patented October 11, 1904.

PATENT ()EEIcE.

JACOBF. ARNOLD, OF MASSILLON, OHIOJ EXTENSION-TABLE LOCK.

SPECIFICATION forming part of Letters Patent No. 772,019, dated October 11, 1904.

Application filed February 19, 1904. Serial No. 194,343. (No model.)

To (LZZ whom, it may concern:

Be it known that I, J ACOB F. ARNOLD, a citizen of the United States, residing at Massillon, in the county of Stark and State of Ohio, have invented a new and useful Extension- Table Look, of which the following is a specification.

The invention relates to a lock for a table having a fixed center leg and extension parts having pedestal parts adapted to be closed on each side of or around the center leg; and the object of the improvement is to provide a simple lock which can be readily applied to any table of this general type and which will effectively lock the extension parts when they are closed together. I attain this object by the construction, mechanism, and arrange ment illustrated in the accompanying drawings, in which Figure 1 is a side elevation of a table, partly in longitudinal section, showing the extension parts closed and the lock adapted thereto; Fig. 2, a detached perspective view of one pedestal part, showing the lock-bar therein; Fig. 3, a detached perspective view of the other pedestal part, showing the locking-bolt and its operating mechanism thereon; and Fig. 4, a view of an alternate form of the bolt.

Similar numerals refer to similar parts throughout the drawings.

The table which is used to illustrate the lock comprises the top 1, with the leg 2 centrally attached thereon, and the extension-slides, as 3, on the lower side of which are attached the pedestal-plates 4, to which plates in turn are attached the respective pedestal parts 5 and 5.

The bolt is preferably made of the two parallel shanks 6, which are connected at the top by the bar 7, on the outer side of which is provided the outwardly-extending tongue 8, and the lower ends of the shanks are bent first inward and then upward, with a slight inclination away from the shanks, thus forming the inclined hooks 9. For convenience the bolt is preferably made of a stiff rod of ironbent to the desired form, as shown in the drawings, and the bolt is attached in one of the pedestal parts by means of the staples or bearings 10, in which the shanks have a free endwise or vertical movement.

The horizontal operating-arm 11 is pivoted on the pedestal-plate, and on its inner end is attached the head 12, shaped as a cylindric segment having the inclined slot 13, in which slot the tongue is adapted to operate. The toothed segment 1 L is attached on the outer side of the pedestal-plate, in the notches of which the operating-arm is normally adapted to be engaged, and on the outer end of the operating-arm is provided a suitable handle, as 15.

The parts being arranged with the bolttongue entered in the inclined slot in thehcad of the operating-arm, the bolt is moved up and down by the rotation of the operatingarm, to accomplish which the outer end of the arm is sprung up to disengage it from the toothed segment, and the bolt is held or locked in a given position by the normal engagement of the operating-arm with the toothed segment.

The lock-bar 16 is transversely attached in the opposite pedestal part, and its middle part is preferably bent or bowed outward to stand away from the center leg when the extension parts are closed, and the side parts are thus enabled to be located inward toward the middle line of the table to be readily found and engaged by the inclined hooks of the bolt The bolt-hooks are located apart to pass freely on each side of the center leg and are adapted to pass clear below the lock-bar when the bolt is down and to engage the opposite side of the lock-bar when the extension parts are closed and the bolt is raised, the inclination of the hooks acting to draw the pedestal parts tightly together.

It will be understood that the bolt can be made with only one shank and hook, as shown in Fig. 4, without affecting the mode of operation of the lock, and it is then desirable to have the hook pass through the slot 17 in the center leg 2, so it will be in the middle line of the table; but as it is not always desirable to perforate the center leg I prefer to use the double form of bolt.

What I claim as my invention, and desire to secure by Letters Patent, is-

1., In a table, separable extension parts, a transverse lock-bar on one part, a horizontal arm pivoted on the other part having a cylindric segment-head with an inclined slot therein there being a toothed segment on the part adapted to engage the arm, and a verticallymovable bolt on the same part having a tongue adapted to operate in the slot and an inclined hook adapted to pass under thelock-bar when the bolt is down and to engage the bar when the bolt is raised.

2. In a table, separable extension parts, a transverse lock-bar on one part, a horizontal arm pivoted on the other part having a cylindrie segment-head with an inclined slot therein, there being a toothed segment on the part adapted to engage the arm, and a verticallymovable bolt on the same part having a tongue adapted to operate in the slot and inclined hooks adapted to pass the sides of the leg and under the lock-bar when the bolt is down and to engage the bar when the bolt is raised.

3. In an extension-table, separable parts, a horizontal arm pivoted on one part having a cylindric segment-head with an inclined slot therein, there being means for holding the arm in a given position, a vertically-movable bolt on the same part having a tongue adapted to operate in the slot, and means made effective by the movement of the bolt for engaging it with another part of the table.

4:. Inan extension-table, separable parts, a horizontal arm pivoted on one part having a cylindrie segment-head with an inclined slot therein, a vertically-movable bolt on the same part having a tongue adapted to operate in the slot, and means made effective bythe movement of the bolt for engaging it with another part of the table;

In testimony whereof I have signed my name to this specification in the presence-of two subscribing witnesses. r

- JACOB F. ARNOLD.

Witnesses: l 1 1 EUPHRAsIA HENRY, HARRY FREASE. 

